Brake device for motor-vehicles.



c HULBERL BRAKE DEVICE FOR MOTOR VEHICLES. APPu'c/xmfi FILED xuLY 27. I916.

Patented Jan. 22, 1918.

2 SHEETSSHEET 1.

C. HULfiEfiT. BRAKE DEVICE FOR mews VEHiCLES.

APPLICATION HLED JULY 21 1916. Patentfid Jan. 22,1918,

' 2 SHEETS-SHEET 2.

cinnamon HULnEn'r, or AUBURN, NEW YORK, 'AssIonoR or onn-ro'oa'rn To rozarlire IBEARDSLEY AND enn-rounu'n T0 ER'WIN o. sornn, Born on AUBURN, NEW YORK.

BRAKE nnvron' non MOTQR-VEHIGLESl Specification of Letters Patent.

Patented Jan,

Application filed July 2?,1916. Serial No. 111,740. 7

To all whom it may concern:

Be it known that I, CLARENCE Hummer, a citizen of the'United States, residin at Auburn, in the county of Cayuga and tate of New York, have invented certain new and useful Improvements in Brake Devices for Motor-Vehicles; and I do herebydeclare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same;

M invention consists in the novel features hereinafter described, reference being had to the accompanying drawings, in which I have shown two embodiments of my invention se-v lected by mefor purposes of illustration, and the said invention is fully disclosed in the followin description and claims.

Referrlng to the drawings;

Figure 1 is a side view of my improved brake mechanismas used with a motor vehicle. v

Fig. 2 is an enlarged view of the same partly in vertical sectlon for illustrating the interlor of the same.

Fig" 3 is a transverse vertical sectional view taken on line 33 of Fig. 2.

, Fig. 4 is a modification showing a single cylinder brake device; a

s Fig. 5 is a horizontal sectional view taken on line 5-5 of Fig. 4. a

The object of my invention is to provide an improved brake for the propeller shaft of a motor vehicle, adapted to be placed betweenv the engine trolled by a lever steering 0st of the vehicle.

A furtiier object is to provide a device of this character, which is in the nature of an attachment and which maybe applied to machines now in use, and which is constructed of separable parts, so that the same or the like, placed on the maybe taken apart for the purposes of cut as the nature of'the invention is better understood, the present invention resides in the combination and arrangement of parts, and inthe details of construction set forth it being understood that changes in the prc "fploy a vehicle of ordinary '.brake"mechanism in convenient and differential, and 'con.

- located at each end of the will move bneofv cise embodiment ofthe inventioncan be made within the scope of the appended claims, without departing from the spirit of the invention or sacrificing any of its ad vantages, k a

Before proceeding with a more detailed description, it may be stated that in the form of my improvement herein shown, I em.-

form spechilv 'mounting my position upon a suitable part of the vehicle, other special means being employed for connecting the brake with'the propeller shaft, whereby whenever the propeller shaft is rotated, it will draw in and force out air in the brake cylinders. The construction or organization of the other parts of the vehicle, does not means being employed for require alterations or-change in any way,

except to remove the propeller shaft casing between the transmission andditi'erential and substitute my improved mechanism. in lieu thereof. i

In the drawings, 1 designates the propeller shaft of a motor vehicle and 2 represents a short casing which surrounds a portion of the shaft and has a flanged end 3 adapted to be secured to the transmission casing (not shown) by any suitable means. Secured to the differential casing i by any desired means, is another short casing 5,

and these casings 2 and 5 support and are bolted to a two-part brake crank case 6, which is split longitudinally and joined by the bolts 7. Mounted on the shaft 1 and crank case ti, are pairs of bearingrings 8, one of whit is steel and the other bronze, and. these rings while forming bearings, also prevent the lubricant which is placed in the crank case, from escaping. A pair of oppositely disposed eccentigi c cams 9, are mounted on the shaft withirithe crank case, and the forked lower ends 10. of connecting rods 11,, are secured to said cams by half collars 12.

Secured to the upper portion of the crank case by means of screwsig l3, is a cylinder block 14, having cylinders =-1 5 and 16, and mounted in each of the cjlll'ldBIS, is a piston 17 which is connected to the upper end of its respective connecting rod by a pin 18. From the foregoing it will be apparent that each time the propellershaft turns, it the pistons upwardly in its cylinder and the other piston downinc v against cushions of air that will cylinders and cams.

in the crankcase through a breathei; .'19,

each timev the cams turn they will splash the oiland effectively lubricate the p stons,

The upper end of of a tapered valve barrel 22, suitably seated in the air passage, and having'a longitudinal .bore 23, and a. transverse air duct 2% The enlarged end of'the'valve barrel is pro vided with an an ular stud 25 upon which is rigidly mounte a thick arm 26 and the smaller end of the barrel has an annular stud 27 which is, rotatably mounted in an aperture in-the air passage. A bolt 28 has its head countersunk in the arm 26, passes through the bore 23 and projects beyond the end of the stud 27. Mounted on the outer v33, pivotally. mounted on the steering post 34, of the motor vehicle, and this lever is pivotally connected to the upper end of a link 35 which has its lower end pivotally connected to the upper arm of a rocking lever 36, and the lower arm of the lever .36 is pivotally connected to the forward end of .a reciprocating rod 37, which has its-rear end pivotally connected to the forward one of the arms 26.

When it is desired to slowly stop the propeller shaft and halt the vehicle, the valves are gradually closed and as the passages 24' are approaching their horizontal position, they will restrict the passage of the air to and from the cylinders. In consequence the piston which is rising will be compelled to force the air in the upper end of its cylin der through an increasingly restricted ,opening while the piston which is descending will draw 'air into ;its cylinder through: a

similarly increasingly restricted opening,"

This has a tendency to halt the shaft and will continue until the v'alvesare entirely closed when the pistons will be working gradually stop the rotation of the shaft.

On the other hand, when it is desired to;

stop the shaft quickly, the valves are speedily closed'and this is tcbe desired in case of great emergency. The effect on the occupants in this instance, will be no greater than would-occurwhen the motor was stalled and the vehicle slides on its'wheels.

w In the modification shown in Figs. fl and 5, but one brake cylinder 50 is employed and the' v'alve 51 is located on the side of the cylinder instead of the. top, and with this construction the operation is similar to the i two cylinder constructio'nJ each of the cylinders .is' 1 provided with an air passage 20, in which is located a rotating valve 21, which consists What I claim and desire to secure by L n SPatent is v 1. :The combination with a rotatable shaft,

- of; a plurality of stationary sleeves 1n which said shaft rctates,a casing supported by said sleeves, a ca nmounted on said shaft within said casing, a cylinder carried by said casing air o'ut ofsaid cylinder through said passage, a rodv connectingzthe piston and cam,

a normally opened'valve mounted in said passage, and means for closing said valve."

2. The combination with a rotatable shaft,

of a plurality of stationa-r pspaced sleeves in" which said "shaft rotates Ltiasing located between and supported "by'saidsleeves, a plurality of oppositely disposed cams fixed to said "shaft, a-.,.cylinder block 1 carried by said casingfland having a plurality of bores,

a passageplacing eachof'said bores in *com- 3 munication with the-atmosphere, a piston mounted'in each of said bores for drawing. f

air into and forcing air out of the bores through said passages, rods connecting the pistons and cams, a normally open valve lo: cated in each of said passages, and means for simultaneously closing said valves.

3. The combination with a rotatable shaft,

shaft rotates, flanges provided on the adjacent ends ofsaid sleeves, jalongitudi ally sleeves and detachablyg secured to said 'flanges, detachable means for securing'the two parts of the casing together, a plurality ice of a plurality of spaced sleeves in whichsaid v of oppositely disposed cams fixed to said shaft within said casing,- niount'ed on the shaft between the cams and the ends of the casing, acylinder block. dc- .tacliably secured to said casing and having a plu'ralityof bores, a passage placing each of the bores in communication with the at.- lmosphere,a' piston mounted in each of said bores fordra'wi'ii air'into and forcing, air 3 out 'of the bores tirough said passages, rods connecting said pistons and cams, a-nor mally open valve located in each of passages, and means for simultaneously clos ngsaid valves. I g l t. ,The combination with a rotatableshaft, of a plurality of'oppositely disposed cams packing 'rin'gs iio fiXedtosaid shaft, a pluralityof cylinders stationarily mounted adjacent said shaft'and each provided on its-top -witha single pas sage for conductingatino'spheiic air into and out of its respective cylinder,- pistons mouse,

ed; ill: said; cylinders, -rods-' connectiiigsaid' plstpnsiand s amanism ltaper'ed walvebar 13b rel located in each of said passages, and provided with a longitudinal bore and a transverse air port, an angular jv extension pro-' vided upon the large end of each of said barrels, a control lever mounted upon each of said extensions and provided witha countersunk angular aperture, a bolt having an angular head resting in each of said apertures and extending through the barrel to aposition beyond the opposite end of the same, a washer provided upon the outer end of each of saidbolts, springs located between the washers and said passages for drawing the CLARENCE HULBERT. 

